Finding the Fourth Proportional to 138,108.63, 207,014.11 and 66,880.47
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Solution
The fourth proportional to 138,108.63, 207,014.11 and 66,880.47 is: 100,248.63
Step by Step Solution
- Step 1: Write the proportion equation
138,108.63 : 207,014.11 = 66,880.47 : x - Step 2: Convert to fraction form
138,108.63/207,014.11 = 66,880.47/x - Step 3: Cross multiply
138,108.63x = 207,014.11 × 66,880.47 - Step 4: Simplify right side
138,108.63x = 13,845,200,806.23 - Step 5: Solve for x
x = 13,845,200,806.23/138,108.63 - Step 6: Final answer
x = 100,248.63
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.